If that refers to “BytesDownloaded: 118184807”, that’s just 118,184,807 which seems about right for a 100 MB dblock, a dindex, and a dlist. Verification samples are in sets of these three. See The TEST command.
If you had a compact, it should have stats in this log file somewhere, including its own BytesDownloaded. Delete of a fileset (version) usually precedes a compact (otherwise there’s no point), and it did delete one. Compacting is an ongoing thing. You keep deleting old versions (retention policy), you keep freeing space. Duplicati won’t modify uploaded files (clouds often don’t allow it), so it creates new dblocks from leftovers.
BackBlaze is reporting large daily downloads when using Duplicati shows some ways to do smaller more frequent compacts if that suits you, but first thing to do is to check logs to see if you can find compact info showing it was the culprit, then you do your storage/bandwidth cost comparison if you’re after lowest cost.